Did you know that the water in your glass might be the very same water dinosaurs drank? Earth’s hydrosphere, which encompasses all the water on our planet, comprises roughly 1.386 billion cubic kilometers (about 333 million cubic miles) - a finite resource that has survived through billions of years of planetary history .

According to Dr. Universe from Washington State University, nearly all of Earth’s water - bar a tiny fraction that escaped into space - has been here for nearly 5 billion years, recycled countless times through the water cycle . Castle Water echoes this, noting that through evaporation, condensation, and precipitation, water continuously loops through Earth’s systems .

The likelihood that a particular water molecule has coursed through a dinosaur’s body is virtually 100%, given the immense mixing over millions of years. So yes - your water today is ancient, recycled, and profoundly connected to life across deep time.